Why would Russia have legitimate reason to be upset with Allied strategy in the European theater?

the United States would concentrate the majority of its strategy to both defeat the Germans and bolster relationships among allies. By that time, however, Russian forces had already defeated the German army

Explanation:

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.

battle of the bulge, but are there any multiple choice options?